Gorman, G. E., & Mills, J. (1992). Guide to current indexing and abstracting services in the Third World. H. Zell Publishers.
Lua i Stíl Chicago (17ú heag.)Gorman, Gary E., agus J.J Mills. Guide to Current Indexing and Abstracting Services in the Third World. London: H. Zell Publishers, 1992.
Lua MLA (9ú heag.)Gorman, Gary E., agus J.J Mills. Guide to Current Indexing and Abstracting Services in the Third World. H. Zell Publishers, 1992.
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